Ore-concentrator.



C. E. THOMPSON & H. NELSON.

ORE CONCEN'TRATOR.

APPLICATION men MAY 29,1914.

1 1 80,2 1 0. Patented Apr. 18, 1916.

2 SHEETS SHEET l.

.sa'afon 0n Ling section. 011 line [7'11 11g. 3.

C. 1;. THOMPSON & H. NELSON.

ORE CONCENTRATOR.

APPLICATION man MAY 29, 1914.

glvwentozs Q M 614w W @W J whim-n 2 SHEETS-SHEET 2.

Patented Apr. 18,

q 1- q N E v NVK m R mi m wa y wtb figuww My 55 BE :2 QQQLQW w UNITED STATES PATENT OFFICE.

CHARLES E. THOMPSON AND HANS NELSON. OF DENVER, COLORADO, ASSIGNORS TO THE MINE & SMELTER SUPPLY 00.. OF NEW YORK, N. X; A CORPORATION OF COLORADO.

ORE-CONCENTRATOR.

Application filed May 29, 1914.

Be it ltnown that we. (n.uihns E. TnoMrs0.\' and llANs Nniisox, eitizens of the lnited States, residing in the city and eounty of Denver and State of Colorado, have invented eertain new and useful Improvements in ()re-tom-entrators, of which the following is a specification.

()ur invention relates to an improvement in ore t' aieentrators. and more partienlarly to what is generally known as a sandtahle of the well-known \illley type.

The primary ohjeet of our present invention is to provide a tahle of greatly iuereased eapaeity while maintaining the highest ellieieney in saving values.

It eonsists of a talile. the major portion of the surfaee of whieh is rillled, these ritlles varying in eonstruetion and arrangement in different areas or tields of the tahle surfaee these variations heing the means of attaining the results mentioned, namely of produeing a tahle of this type of maximum eapaeity and etlieieney.

In the aeeompanying drawings l igure l is a top plan view of the tahle; Fig. .2 is a seetional view on the line (l-(l at the eoneentrates diseharge end of the tahle: Fig. 3 is a section on a line ll ll extending di agonally aeross the tahle from the eorner or juneture between the eoneentrates diseharge end and the tailings disrharge side of the table; Fig. 4-. is a seetion on the line 11 l; taken lengthwise of the table and at the lower ends of one set of the diagonallyplaeed rillles; Fig. 5 is a seetion on the line J J at the meehanism end of the table: Fig. is a seetion on the line I\' K at the eoneentrates diseharge eorn r of the .tahle; Figs. 7, 8. f and 10 are views in side elevation of rillles on the various planes or fields of the tahle: Fig: 11 is an illustration of a form the ritlles whieh gradually reduee in height throughout their length might talt'e in lieu of the uniform gradual taper illus trated in the other figures; and Fig. 12 is a transverse seetion showing ritlle-eleats in groups of ritl'les of uniform height.

As it is well known that tables of this type have a side slope, an adjustment hoth sidewise and endwise, side wash and endwise motion. these features will not require detailed illustration or elaboration.

The major portion of the surface illustrated is ritlled in three main fields or areas,

Specification of Letters Patent.

Patented Apr. 15, 1916.

Serial No. 841,877.

whieh are designated by the letters A, B and t. Then there are the fields of less area I) and E at the (concentrates discharge eorner and the tailings discharge side of the table respectively, and the remaining relatirely smooth field F at the feed corner. The riflles in the two fields A and B. instead of being placed parallel with the tailings diseharge side and stroke line of the table. are disposed diagmially t that side and the strolie line. The ritlles l. l. in the lield A. extend from the me hanism end to the diagonal line a. their head terminals tarting preferably at or near the eorner of the table lietween said end and the failings dis harge side thenee partway aeross the talile toward the feed side. and the rillles 2. in the tield l) extend from the ahove-ineir tioned eorner of the tahle and the upper limits of the lield 15 at the tailings diseharge side. to said diagonal line (I. These ritlles l. l. and 2. 2, in the fields A and l) preferably are all parallel with eaeh other and tapering gradually and uniformly throughout their entire lengths, lieing highest at the me hanisai end and at the upper limits of the lield ll near the tailings diseharge side and lowest at the diagonal line a. and of gradually and uniformly redueed height from the feed side or rillle ii to the iuuetnre of tield ll with the tields l) and It. as the seetions shown in l igs. i l and ii in dieate. This gradual reduetion in the height of the rilllea'leats upon the ineline of the tields A 1%. faeilitates rapid removal of the light sand or waste. allowing it to travel diagonally down the ineline and over the lield 1) into the tailings rare lleneath. liaeh of these individual ritlle'eleats instead of lieing uniformly redueed in height (as shown in Figs. 7 and Si might l e redueed in steps (as shown in Fig. ll). in whieh event the ends of the steps of eaeh lower ritlle would advanee slightly beyond the eorresponding end of the step of the rillle just above. so that in other words these steps would ad \anee diagonally along the tahle surface, as is well understood. The higher ritlles with the 'deeper intervening ehannels toward the feed side of the table. at once eateh l y far the larger percentage of the heavier eoneentrates and eonvey them toward the diagona] line (I. and the shallowing ehannels he eoming uniformly shallower and shallower down the slope of the table "-5 the pulps --vel down this inclined surface, are adedc t atch and advance the progrt vcly 'l't lt. lt; peicentage ot com-entratcs, and .l hle the possihility of their loss while .ie waste sands meet with less and less re- -istan c h v reason of the shallowing of the intervening hannels produ ed hy the diminishing height of the rilllc cleats. as indi rated. The hallowing or shoaling of the channels down the incline of the tahle, while illustrated as heing unil orui t'r in rillle-cleat to rillleleat. ohviously might he arranged in group ol two or more rillles producing oups of channels ot uniform dimensions ach group as shown in Fig. 12.

The little-cleats in the field C extend from th diagonal line 1/ to the concentrates discharge end with the ciception of three or tour at the feed side which terminate one hev ud an ther. and are ol nnit'orm height from the diagonal line 1/ throughout the length ol each rillle. hut. the height of the rilllcs is not the same. they heing gradually reduced from the feed side toward the tailings dia-harge side (as shown in Fig. 2 whi h is a section tillx'tll on the line (frt} of Fig. 1) and these are arranged as continuations of rilllcs in the lields A and B, only at a dill'erent angle, preferably extending parallel to the line of stroke and the tailings dis harge side as illustrated. There hut) he one of these rilllcs for each of the rittles in lields A and B: or one for everv alternate ritllcin fields A and B; or thcv may he extensions of every third, t'ourth.

rilllc of said fields; or of corresp nding groups of r illes as dcscrihed; or thcv might lomitted altogether, as these riille 1. L. in the lield have little, in fact pra ticallv nothing. to do with the concentration or cleaning up. as these rillle-cleats nd the intervening channels serve as con vcv rs ol' the product. which in the propel normal operative adjustment of the tahle is 11- unicr iallv leaned when it has reached the oi gonal line 1/. where snhstantially the line -l' scpamtion lit-tween the values and was i maintained.

The high r rillle-cleats on tield (l nearest the upper or i-watcr side of the tahle torniing the deeper and more ca ulcious he. n l guide. direct and carry into the blitt'lttliltt'SdPUX the major portion (the lean ierl ol' the eoin-entratcs high up on the con entrat diz-charg nd of the tahle. while the light r n entrates are carried oll hy the channels 'arth r own the in line f that till. Uhviou l v the concen '5': cs dis harged up n thi field lrv the manu in the liel ls i\ and l hcc ming l li'i antity a th material or:-

nt pr d down the incline of tin ij't'u lthtlly diminishing chanin th hell] have adequate capacity to rfiiih while the uniform shoal ing ol' these channel in conformity with the lowering of the tern'iinals of the cleats ot' the lields A and I) along the diagonal line 1/. preserves a uniformity of the plane of the lands or tops of the entire rillle system of the whole tahle-surface. for the uniform and even flow of the feed and washwater. all of which. of course. has to flow transversclv across the rilile-cleats.

It will he observed that the rilllc-cleats in the fields A and I3. hv reason of their heing disposed diagonally to the stroke line of motion and the tahle being operated with a transverse inclination, and substantially level lengthwise (although not necessarily so) the concentrates caught in the channels of these fields and B are compelled hy the ritllewlcats to climb slightly tip-grade. up the transverse incline ot' the table. This upward climh has the eti'ect of retarding somewhat the advance of the concentrates in these channels, and to subject them for a somewhat longer period of time to the side wash of the water to thus more completely remove the gangue.

The rifllecleats of the field E, of which four are shown in the drawings, but which it is understood might be more or less in number, preferably extend throughout the length of the table, that. is from the mechanism to the concentrates discharge end. and serve to catch particles of value which occasionall v find their way entirely across the fields A and B, and to advance them di rectly on to the field l) at the lower concentrates corner of the table. where occurs the final clean-up of the lniddlings which are gathered there from the fields A. B and I). These ritllc-cleats in the field E gradually diminish in height from the mechanism end to the concentrates discharge end of the table. the lowest or last one on the tail ings-discharge side preferably heing higher for a portion of its length at the concentrates discharge end of the tahle. and capahle of variations as to such height as may best suit for the particular material under treatment. This is done for the purpose of carrying a middling product over the conccntrates-discharge end that would otherwise pass over the tailings discharge side l'rom the field l). The huilding up to suitahlc height of the lowest rillle-clcat in the ticld E. which extends through the licld I) for a suitahlc distance hack from the lower concentrates corner. is of great importance in llltllx'lllfl' a final rlcairup ol' the middlings asseinhled on the licld l). as indicated,

The several elevated cleats ahutting on th upper side of the l'ecd corner ol' the lltltl l. six ml whi h :ll't' illu trated. llllt a|| numher of which might he employed. are approvinmtcly a l'oot in length in the l'ulli'/.c talilc. and l rtun one-hall to three fourths ol an ilr'h in height. al su h other height or length as may be desired for the particular work to be done. These are laced approximately at right-angles to the ire of stroke. These cleats are not rillles in the full sense, but may be termed feed-diverters or distributors, they holding the feed from the feed-box back toward the mechanism end of the table and serving to more equally distribute the silica-bed in its travel to and upon the rifiled field A. These feed diverters or distributors (l, 6, assist very materially in adding to the capacity of the table by diverting a large part of the silica toward the portion of the field A abutting upon the mechanism end of the table.

When the pulp is dropped from the feedbox into the intervening space, a partial Stratification takes place at this point while passing downward to their lowest ends, whereupon the heavier materials at once sta t of? toward the field C on the relativel smooth surface above the field A, while the lighter are carried dovmward. impelled hy the feed and wash water into the riillcs l, l, of the field A.

In the most effective operation of this construction. the transverse inclination should be such as to elevate the tops or lands of the rifilc-cleats at point d on the diagonal line a: above the horizontal plane level of the same rillle at point 1'), the mechanism end of the table, thus adjusting the plane of the tops or lands of the series of cleats in the lields A and. B so as to slope somewhat toward the mechanism end, thus forcing the waste sand back toward the lowcr mechanism corner, while the concentrates in the intervening channels are impelled toward the field C, slightly upgrade to the diagonal line 0,.

The degree of. transverse inclination in conjunction and coiiporatimi with the angular disposition of the cleats in the fields A and B to the stroke line of the table has been found to he most ell'octive in increasing the capacity of the table. Increasing the inclination increases the liow and spreading ol' the waste sands toward the nicclmnism cud of the table.

1. A reciprocating concentrating tahle having a plurality of tapering rilllos on thc surface which intersect the line o'l' movement of the table. and which tcrininatc along a line at an angle to the line of movement,

,and rifiles of uniform height extending from terminals of certain of the first-named rilllcs to the concentrates end ol the tahlo, and said ritlles of uniform height heing ol dccrcascd height as they approach the tailings discharge side of the table and loss in numher than the diagonally-placcd rillles.

A reciprocating concentrating table provided with twoma'in sets of rillles, one set tapering and disposed diagonally on the table surfaoe,and of decreasing height successively down the surface of the table, and the other set disposed longitudinally and located nearer the concentrates discharge end than, and in an end to end relation with, those of the first set, and the individual riflles thereof uniform in height throughout their length and decreasing in height successively down the slope of the table.

3. A reciprocating concentrating table having three main areas, one comparatively narrow located at the lower tailings discharge side on which surface is a series of longitudinal rillles, another at the concentrates end extending to a diagonal line part way to the feed end on which are longitudinal rifiles parallel with those at the tailings discharge side, and the third area having rillles which are arranged diagonally and eX- tend from the feed end and from the highest rilllc of the area near the tailings discharge side to the diagonal line.

4. A reciprocating concentrating tahle having three main areas. one comparativcly narrow located at the lower tailings dis charge side on which surface is a series of longitudinal rilllos, anothcr at tho conccir tratcs cnd extending to a diagonal line part way to the feed end on which are longitudinal rilllcs parallel with those at the tailings discharge sidc. and the third area having rilllcs which are arranged diagonally and extend from thc lccd end and from the highest rillle of the area near the tailings discharge side to the diagonal line, said diagonal rilllcs all tapering throughout the length of each and of reduced height from upper to lower side.

5. reciprocating concentrating tahle having thrcc main areas, one coimmrativcly narrow located at the lower tailings dischargc sidc on which surface is a series of longitudinal rillles, another a the concentrates cud extending to a. diagonal line part way to the feed end on which are longitudh nal rilllcs parallel with those at the tailings discharge side, and the third area having rillli-s which are arranged diagonally and extend from the feed end and from the highan. rillle of the area ucar the tailings discharge Slllt' lo the diagonal line, said diagmm] rilllcs all tapering thrmighoutithe length; of cncll and of reduced height from upper to lower side, the longitudinal rillles at the tailings discharge side tapering throughout, and tho rilllcs at the concentrates discharge end each of uniform height throughout, but each successive one lower than the next rilllc above.

6. A reciprocating concentrating table, the major portion of whose surface is rillled, the rifiles along the tailings discharge side and the ritlles from a diagonal line across the table to the concentrates discharge end approximately parallel with each other and with the line of motion of the table, and the &

internu-diate ritlles hetween said diagonal hue and the lllllts alongthe tailings discharge .-nle ot the tahle extending diagox reeiprm'ating eoneentrating table, the major portion of whose surt'aee is riftled. the rillles along the tailings diHeh-arge ide and the ritlles from a diagonal line ael'oss the tahle to the eoneentrates dish-arge end approximately parallel with eaeh other and with the line of motion of the tahle. and the intermediate ritlles hetween said diagonal line andsthe ritlle along the tailings diseharge side of the tahle extending diagonally. said diagonal ritlles \'ar \"ing in height throughout their length.

8. reeiproeating concentrating tahle. the major portion ot'- whose surfaee is ritlled. the ritlles along the taillllgs diseharge side and .the rillles from a diagonal line aero; the tahle to the mneentrates dim-harge end approximately parallel with eaeh other and with the line of motion of the tahle. and the intermediate rillles between said diagonal line. and the ritlles along the tailings diseharge side of the tahle extending diagonall said diagonal rillles \'ar \'ing in height throughout their length. and slleeessive riftles of diminished height from the feed toward the tailings diseharge side ot' the table.

9. longitudinally reeiprm-ating eoueentrator table. the s'urt'aee of whieh has two main St'tH of ritlles. one of whieh extends parallel with the line of motion of the table. and the other diagonally. the tormer set of rillles extending from the eoneentrates diseharge end to a line extending diagonally aeross the table part way to the angle formed hetween the eoneentratesdiseharge end and the tailings diseharge side. over said line in |)IU.\lllllt to said angle of the tahle. and thenee al ng the tailings diseharge side. and the other set eurering the major part ot the remaining portion ot the. table nnoeeupied l: the tirst mentioned set, of ritlles.

1t). longitudinally reeiproeating eoneentrator table. the surl'aee ot' whieh has two main sets ol' rillles. one of whieh extends parallel with the line of motion ol' the tahle. and the other diagonally. the l'ormer set of rillles extending from the eoneelltl'ates tll$ieharge end t a line extending diagonallv 'aeross the table part \\'a to the' angle formed hetween the tHllt'tlltl'ilt-th' di eharge. end and the tailings diHeharge side, over said line in |n'o.\i|nit\' to aid angle of the tahle. and thenee along the tailings disehal'ge ide. and the other set entering the major part 01 the remaining portion of the tahle unoeeupied h the longitudinal rillles. Stilt] rillles at the eoneentrates disel'iarge end eaeh of uniform height throughout it. length. and th se at the tailings tlll t'llili"" side of redueiug height throughout their length. r

l1. ongitiulinal r reei n-oeating eoH eentrator tahle. the surt'aee ol' whieh has two main ets of rillles. one ot whit-h extends parallel with the line of motion of the. tahle. and the other diagonall the l'ornn-r et of rillles extending l'rom the mneentrates diseharge end to a line extending diagonally a ross the t'ahle part way t the night formed hetweeu the eolneiitiztte. di eharge end and the tailing di eharge .-ide over aid line in proximitr to aid angle of the tahle. and thenee along the tailiugs diseharge ide. and the other et eorering the major part of the remaining portion of the tahle unoeeupied h the longitudinal i'illles. said ritlles at the eoneentrate diselmrge end eaeh of uniform height throughout it length. and tho e at the tailings di eharge side of redueing height throughout their length. and the lowermost of whieh latter 'itlles are ol' greater height than its adjaent rillles.

12. A ltlt|; "ltlttllll:lll reeiproeating eom entrator tahle. the url'aee ot' whieh has wo main et ol' ritlles. one of whieh exends parallel with the line of motion of the tahle. and the other diagonally. the former .-et of rillles extending from the eoneentrate diseharge end to a line extending diagonally aeross the tahle part way to the angle formed hetween the eoneentrates diseharge end and the tailings diseharge side. o\'er said line lIl |H'tlXlllllt to said angle of the tahle. and theme along the tailings (lisharge aide. and the other set eorering the major part of the remaining portion of the tahle unoeeupied h the longitudinal rillles. said rilllex at the eoneeutrates diseharge end aeh of uniform height throughout its length. and those .at. the tailings diseharge side ot reducing height throughout their length. said rillles at the eoneentrates diseharge end of varying height from the feed to the (Ullttlltl'iltl'h' diseharge end of the tahle.

' [n te5timon whereof we allix our signaures. in the pre enee of two witnesses.

('llARLlCS li. 'IHUBHSUN. HANS NICLSOX. itnesses:

lli-zxin' lCooizas, l). Home 'usox. 

